Nadab and Abihu - The two elder sons of Aaron Exodus 6:23; Numbers 3:2, who were among those invited to accompany Moses when he was going up Mount Sinai, but who were “to worship afar off,” and not “come near the Lord.” Exodus 24:1-2.
Censer - See Exodus 25:38 note.
Strange fire - The point of their offence is evidently expressed in this term. This may very probably mean that the incense was lighted at an unauthorized time. And we may reasonably unite with this the supposition that they were intoxicated (compare Leviticus 10:9), as well as another conjecture, that they made their offering of incense an accompaniment to the exultation of the people on the manifestation of the glory of the Lord Leviticus 9:24. As they perished not within the tabernacle, but in front of it, it seems likely that they may have been making an ostentatious and irreverent display of their ministration to accompany the shouts of the people on their way toward the tabernacle. The offence for which they were immediately visited with outward punishment was thus a flagrant outrage on the solemn order of the divine service, while the cause of their offence may have been their guilty excess.